Only changes FUTURE locks — those already created keep their maturity, engraved in their script since creation.

Key validated by real derivation before being saved — a broken xpub is rejected here, not discovered years later. Only applies to FUTURE vaults; remember to regenerate and share the kit afterward.

Same public data already shown for each VAULT#n above (addresses, lock heights) — no private key. The app re-derives every entry from its own xpub before trusting it, same as everywhere else.